springmvc跳转到指定网站

@RequestMapping("/tttt")
public void testRed(HttpServletResponse response) throws Exception{
System.out.println("tttt");
response.sendRedirect("https://www.baidu.com");
}

@RequestMapping("/ssss")
public String testRedSSS(HttpServletResponse response) throws Exception{
System.out.println("ssss");
return "redirect:http://www.qq.com";
}